Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 28-03-2023 and time 10:57:01 (UTC) in region 6 km W Giano dell'Umbria (PG)

A magnitude ML 0.9 earthquake occured in region: 6 km W Giano dell'Umbria (PG), on

  • 28-03-2023 10:57:01 (UTC)
  • 28-03-2023 12:57:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8410, 12.5000 at 6 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Giano dell'Umbria PG 6 3846 3846
Massa Martana PG 7 3770 7616
Collazzone PG 8 3473 11089
Gualdo Cattaneo PG 9 6155 17244
Todi PG 10 16851 34095
Fratta Todina PG 11 1839 35934
Monte Castello di Vibio PG 12 1567 37501
Bevagna PG 14 5081 42582
Montefalco PG 14 5679 48261
Castel Ritaldi PG 14 3278 51539
Marsciano PG 15 18902 70441
Acquasparta TR 17 4778 75219
Deruta PG 17 9669 84888
Cannara PG 19 4305 89193
Bettona PG 19 4367 93560
San Venanzo TR 19 2218 95778

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SW of Foligno (57155 inhabitants)
31 Km SE of Perugia (166134 inhabitants)
33 Km NW of Terni (111501 inhabitants)
57 Km NE of Viterbo (67173 inhabitants)
86 Km SE of Arezzo (99543 inhabitants)
92 Km NW of L'Aquila (69753 inhabitants)
95 Km N of Guidonia Montecelio (88673 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.9 2023-03-28
10:57:01		 42.8407 12.5003 6 2023-03-28
11:06:27		 Sala Sismica INGV-Roma 115821021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-28 10:57:01 ± 0.12
Latitude 42.8407 ± 0.0072
Longitude 12.5003 ± 0.0074
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 115821021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 632
Semi-minor axis of confidence ellipse (meter) 552
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 185
Circular confidence region, given by single value of horizontal uncertainty (meter) 630.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 0.47214
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 115821021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-28 11:06:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2023-03-28T10:57:19.56 0.3 undecidable manual S 65 52.4031 50 0.37 65
IV.MGAB.HHZ. 2023-03-28T10:57:13.04 0.3 undecidable manual S 284 32.5452 101 -0.11 71
IV.ASSB.HHZ. 2023-03-28T10:57:11.29 0.3 undecidable manual S 30 25.8519 103 0.43 67
IV.FDMO.HHZ. 2023-03-28T10:57:11.18 0.3 undecidable manual P 65 52.4031 50 -0.59 61
IV.CESI.HHZ. 2023-03-28T10:57:08.86 0.3 undecidable manual P 61 37.5291 99 -0.41 66
IV.MGAB.HHZ. 2023-03-28T10:57:08.41 0.1 undecidable manual P 284 32.5452 101 0.12 94
IV.CESX.HHE. 2023-03-28T10:57:07.36 0.1 undecidable manual P 165 26.6511 103 0.22 93
IV.ASSB.HHZ. 2023-03-28T10:57:06.73 0.3 undecidable manual P 30 25.8519 103 -0.24 70
IV.MOMA.HHZ. 2023-03-28T10:57:04.82 0.1 undecidable manual S 126 6.993 131 -0.05 100
IT.GNU.HGE. 2023-03-28T10:57:04.83 0.1 undecidable manual S 126 6.993 131 -0.05 100
IV.MOMA.HHZ. 2023-03-28T10:57:03.55 0.1 undecidable manual P 126 6.993 131 0.04 100
IT.GNU.HGE. 2023-03-28T10:57:03.57 0.1 undecidable manual P 126 6.993 131 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MGAB.HHE. ML:0.7 0.000027263235000000003 0.2624 AML other m 2023-03-28T10:57:14.19
IV.MGAB.HHN. ML:1.0 0.000049397024999999997 0.2432 AML other m 2023-03-28T10:57:14.97
IV.FDMO.HHN. ML:1.2 0.000035799999999999996 0.42 AML other m 2023-03-28T10:57:31.77
IV.FDMO.HHE. ML:1.2 0.0000343 0.42 AML other m 2023-03-28T10:57:34.59
IV.MOMA.HHE. ML:0.0 0.0008503026 0.1344 AML other m 2023-03-28T10:57:05.12
IV.MOMA.HHN. ML:0.0 0.000041609864999999994 0.1408 AML other m 2023-03-28T10:57:05.77
IV.MOMA.HNE. ML:0.0 0.0008053224500000001 0.1472 AML other m 2023-03-28T10:57:05.11
IV.MOMA.HNN. ML:0.0 0.0005268349 0.1408 AML other m 2023-03-28T10:57:05.70
IV.ASSB.HHE. ML:0.6 0.00002673802 0.1984 AML other m 2023-03-28T10:57:11.40
IV.ASSB.HHN. ML:0.8 0.00003918149 0.2816 AML other m 2023-03-28T10:57:11.48
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download